Hey grim, years ago, I was a fish breeder.
I used sodium sulfate to remove chlorine. I always had healthy systems so I didn't worry much about the ammonia left over when we had to deal with chloramine.
However, we did have sodium formaldehyde bisulfite on hand for brand new systems that had no organic filtration established.
My opinion is, I like the chlorine, it kills a ton of pathogens and dissipates within hours. I have never noticed it causing a problem to my plants.
PS. my tap has chloramine in it, with a fairly high chlorine content in the warmer months.
The product you pictured is ridiculously expensive when compared to the cost from a chemical co.